Preparation of safe drinking water
US4693832A · kind A · utility
23Cited by
10References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 27, 1985 |
| Grant date | Sep 15, 1987 |
| Priority date | — |
| Expiry date | Nov 27, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F1/78
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A disinfection process is provided for preparing potable water having an unusually persistent and long lasting free available chlorine residual in order to assure safety and integrity of said water during its passage through the distribution system by which it is delivered to the consumer. The key step of this process is the generation of said unusually persistent free chlorine residual by mixing into a semi-finished water, which has already been pretreated specifically to satisfy substantially its immediate chlorine demand, dilute solution of HOCl having a pH between about 3 and about 6.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.